Respiratory mask



FIG. 1 is a top perspective view of a respiratory mask;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a rear elevation view thereof;

FIG. 7 is a left side elevation view thereof; and,

FIG. 8 is a right side elevation view thereof.

The broken line showing of portions of the respiratory mask form no partof the claimed design.

The dot-dash-dot broken lines define the bounds of the claim and form nopart thereof. The boundary lines appear on interior surfaces of therespiratory mask, where visible, and immediately adjacent to claimededges, representing that the interior surface forms no part of theclaimed design.

CLAIM The ornamental design for a respiratory mask, as shown anddescribed.